I. Introduction
The quench behavior of an HTS magnet is an important issue to realize reliable protection scheme for superconducting devices [1]. Traditionally the high field superconducting coils were cooled by a liquid helium bath or nowadays with those new High-Tc materials with cheaper liquid nitrogen. Unfortunately the critical temperature of the , well below the boiling point of liquid nitrogen precludes this way. Recently, the development of ready to use cryocoolers was applied in cooling such superconducting magnets and in particular those based on conductors. In all these cases the quench properties can be correctly analysed only on their cryogen free working environment of usage.